JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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tripleg_group [2018/09/14 01:13]
gastis 		tripleg_group [2018/09/14 09:32] (current)
gao
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 **Q3.** **Q3.**
 We use the example from the wiki [[https://wikihost.nscl.msu.edu/JIOSS/lib/exe/fetch.php?media=dispersion.zip|Dispersion]] as a starting point and do the following: We use the example from the wiki [[https://wikihost.nscl.msu.edu/JIOSS/lib/exe/fetch.php?media=dispersion.zip|Dispersion]] as a starting point and do the following:
 +
 1, Find the lines as shown in the picture below: 1, Find the lines as shown in the picture below:
 {{:dispersion_ele.png?direct&400|}} {{:dispersion_ele.png?direct&400|}}
 +
 In the picture above, each of the commands (DL, DP, MQ ...) represents an ion optics element. (For a complete reference of the commands used in the cosy script, one has to refer to the manual). Here in the step 3 of [[https://wikihost.nscl.msu.edu/JIOSS/lib/exe/fetch.php?media=project_for_the_jina_ion_optics_for_recoil_separator_school_v4.pdf|this project]], what we want is very simple:a drift, 45-degree dipole magnet with a 1 meter bending In the picture above, each of the commands (DL, DP, MQ ...) represents an ion optics element. (For a complete reference of the commands used in the cosy script, one has to refer to the manual). Here in the step 3 of [[https://wikihost.nscl.msu.edu/JIOSS/lib/exe/fetch.php?media=project_for_the_jina_ion_optics_for_recoil_separator_school_v4.pdf|this project]], what we want is very simple:a drift, 45-degree dipole magnet with a 1 meter bending
 radius and a drift. So we modify this part of the script as shown in the picture below: radius and a drift. So we modify this part of the script as shown in the picture below:
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 **Q4.** **Q4.**
  
-In step 4, we calculate the reaction kinematics for the 15O(a,g)19Ne reaction at 57MeV (~3MeV/u) in the lab system. +In step 4, we calculate the reaction kinematics for the 15O(a,g)19Ne (Q=3528.47MeV) reaction at 57MeV (~3MeV/u) in the lab system. 
 {{ :3mev15o.png?direct&400 |}} {{ :3mev15o.png?direct&400 |}}
  
-The energy spread in this case is about +-2% (maximum energy acceptance of SECAR: +-3.1%), and the angular spread is ~ +-10mrad (maximum angular acceptance of SECAR: +- 25mrad). At this energy the reaction products fit in our system without any problem. However, at lower beam energies the energy spread becomes larger. The estimated minimum beam energy that we can go until we reach SECAR's maximum energy acceptance is about 0.5MeV/u (lab system). For reaching the maximum angular acceptance we need energies above 20MeV/u.+The energy spread in this case is about +-2% (maximum energy acceptance of SECAR: +-3.1%), and the angular spread is ~ +-10mrad (maximum angular acceptance of SECAR: +- 25mrad). At this energy the reaction products fit in our system without any problem.  
 + 
 +The maximum energy that we can go until we reach the maximum energy acceptance of SECAR is ~8.2 MeV/u. 
 +For reaching the maximum angular acceptance we need energies above 20MeV/u. 
 + 
 + 
 + 
 +* all energies are in the lab system. 
 + 
 + 
 +{{ :gammas19ne.png?direct&400 |}}
  
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/srv/thewikis/JIOSS/data/attic/tripleg_group.1536902019.txt.gz · Last modified: 2018/09/14 01:13 by gastis

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